Questions which refer to software RAID implementations.

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1answer
997 views

degraded mdadm RAID5 array

My /dev/md0 array just died last night. I got this email This is an automatically generated mail message from mdadm running on A Fail event had been detected on md device /dev/md0. It ...
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2answers
91 views

improving an old pc - using two HDDs

I have an old Athlon machine with 1.5GB ram and two HDDs and will install Windows 7 on it (for my mom to browse and mail). Can I get some extra performance out from the two disks? I see two scenarios: ...
3
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2answers
434 views

Is Online Capacity Expansion possible in Windows 7 software raid?

Many low-end raid cards now offer Online Capacity Expansion (OCE) and Online Raid Level Migration (ORLM). This explains both. Can I do OCE or ORLM on my Windows 7 software RAID to add disks and/or ...
2
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1answer
6k views

Install Linux mint with Raid

My MB supports fake raid (Intel DH67CL motherboard). But I was using the system in 'software raid' as I could not correctly set up fake raid in Debian. Now, I decide to use Linux Mint 12. During the ...
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3answers
4k views

How do I create a complete disk mirror in Windows Server 2008?

I'm trying to mirror a full Disk in Windows Server 2008, however I don't see any options to mirror a full Disk, only Volumes. Both disks are the same brand, size and are configured as Dynamic Disks, ...
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0answers
54 views

Windows 7 Raid - Drives can't see each other

I'm trying to stripe two drives using the disk management tool. Both partitions give me the option to stripe them but when I use the wizard the other drive doesn't show up to allow me to raid to it! ...
0
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1answer
65 views

Need to replace OS drive on ubuntu system, how do i keep soft-raid partition?

So right now I have a HTPC with 5 drives in it. One drive is an OS drive (mounted on /) that is starting to fail, SMART is telling me continually that I have bad sectors. The other drives are 4 ...
0
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1answer
492 views

Update grub for whole disks added to software raid

I have a raid-1 running under rhel6 (/dev/md0) that is mapped to /. It contains two unpartitioned disks (/dev/sda and /dev/sdb). I'd like to be able to boot from either disk. But grub won't let me ...
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3answers
430 views

RAID-1 in RHEL 6; can't get partitioning on identical devices to look identical

I have a RHEL 6 fileserver. It contains two identical 2TB SATA drives. Both are supposed to contain one partition that takes up all the space on the drive (and this used to be the case). When I had ...
4
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3answers
499 views

Several questions about software and onboard RAID 5

I have a few questions on how software and onboard RAID 5 compare: Is there any way to add a disk to an existing RAID 5 array using either software or onboard RAID? All motherboards I'm interested ...
0
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0answers
263 views

Reformat soft RAID-5 Ubuntu

I built a linux (Ubuntu) box a year ago and decided to have some fun and use a soft RAID 5. I followed the instructions here. Things seemed to work fine, but now it's time to reformat the computer ...
3
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1answer
3k views

Sharing an Intel RST between Windows and Linux

I have an Intel z68 motherboard, which makes use of Intel Rapid Storage Technology (RST) -- Version 10.5. If possible, I'd like to split my RAID 1+0 RST drive equally between a Linux and Windows ...
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1answer
636 views

CentOS - mdadm raid1 drive won't mount to default location

I'm running CentOS 5.5, the system, boot, swap, etc. is all on /dev/sda and I have two identical single-partition drives /dev/sdb1 /dev/sdc1 that are configured in RAID1 (using mdadm). It was working ...
9
votes
3answers
16k views

How-to change the name of an MD device (mdadm)

Here is the output from mdadm -Esv: ARRAY /dev/md127 level=raid0 num-devices=2 UUID=d89d9d45:9a420812:c44c77eb:7ee19756 devices=/dev/sdb8,/dev/sda8 This is a v0.90 array. The question is as ...
0
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1answer
715 views

How to remove swap partitions from RAID 1 Array on Ubuntu?

Can anyone point in the right direction on how to remove SWAP out of a RAID1 configuration on Ubuntu 10.04 server? According to the Ubuntu Advanced installation guide, here, it said to add swap to the ...
1
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1answer
890 views

Why do motherboard manufacturers continue to include fake RAID? [closed]

Windows 7 is becoming ubiquitous and offers a simple software RAID solution within the OS. Modern desktop Linux distros have good software RAID capability as well. But mid to high end motherboards ...
0
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1answer
246 views

Windows 7 Mirroring Drive Failure

I had a few questions when a drive fails that is setup with software RAID 1 in Windows 7, e.g. Dynamic disk mirroring: Will it still boot using the good drive (assuming boot drive is RAID 1), or ...
3
votes
1answer
220 views

I'm trying to mirror drives of the same model, but one appears to be slightly larger

I'm trying to mirror a drive using Disk Management in Windows Home Server 2011. The target drive (Disk 1) is the exact same model as the source drive (Disk 0), but the target drive appears to be 1MB ...
1
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1answer
3k views

Performance of RAID 5 with mdadm

I have set up a software-raid 5 with mdadm on a 1.3 GHz AMD Neo 36L dual core machine using 3 1.5 TB Seagate Barracude Green drives (4k sectors). The chunk size of the raid is 512 KB. On top of the ...
4
votes
3answers
297 views

Three-way mirrored RAID in Windows 7?

I sometimes find bit-rot in some of my files. This is rare, but does happen. It annoys me that this is a) undetected for long periods of time and b) not fixable (except from backups), even with the ...
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2answers
759 views

Does chunk size affect the read performance of a Linux md software RAID1 array?

This came up in relation to this question on determining chunk size of an existing RAID array. The general consensus seems to be that chunk size does not apply to RAID1 as it is not striped. On the ...
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2answers
7k views

How to install software RAID using Mint Live CD

I wish to install Linux Mint 11 with RAID 1 for my /home. I was wondering if I can install RAID 1 during the installation from the Live CD. I have managed to set up RAID from the Live CD and install ...
0
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1answer
355 views

How can I deal with a full striped volume?

I created a striped logical volume in Windows 7 x86 that is across 3 x 2TB drives. It's almost completely full, and I smacked my forehead when I realized today that you apparently cannot add drives to ...
2
votes
2answers
2k views

How to setup RAID 5 - Windows Home Server

I am planning to install Windows Home Server 2011 on my new mini server. I have 3 x 2TB hard drives and another hard drive for the OS. I can't find any tutorials on how set up RAID 5 on Windows Home ...
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3answers
3k views

Bad performance with Linux software RAID5 and LUKS encryption

I have set up a Linux software RAID5 on three hard drives and want to encrypt it with cryptsetup/LUKS. My tests showed that the encryption leads to a massive performance decrease that I cannot ...
4
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2answers
1k views

P4 vs. I3/i5 *T in power consumption and performance

I am running an Intel P4 prescott with HT on my home server (linux file server on encrypted disks on software-RAID5 and virtualisation host for three further machines). The performance for this ...
0
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1answer
387 views

Possible to load old software raid array on new system? Ubuntu

I am looking into a more redundant solution to my home server. I know raid is "not" a backup, but I am looking into a raid 5 solution for these reasons. I would be very annoyed if I lost my data, ...
1
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1answer
795 views

Recover Linux software RAID5 array after server upgrade

I recently upgraded a server from Fedora 6 to Fedora 14. In addition to the main hard drive where the OS is installed, I have 3 1TB hard drives configured for RAID5 (via software). After the upgrade, ...
15
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2answers
5k views

combining SSD and hard disk in software RAID1?

Does it make sense to build a Linux software RAID-1 (mirroring) using an SSD and a normal hard disk? I want to combine the advantages of SSD (fast transfer rates, fast access times) with the ...
0
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1answer
643 views

Software RAID performance/limitations in degraded mode

Trying to polish the final fine details of software RAID mission critical home-server solution. I am curious about the server performance in RAID-1 (mirroring) degraded mode (where one of the hard ...
2
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1answer
449 views

Software RAID and backup altogether

In this thread I've got most valuable tips regarding the home RAID solution options as well as their pros and cons: RAID for home use I've figured out for myself a few important points (the ...
0
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1answer
82 views

backuppc - will it work with flexraid (or similar)

Will backupcpc work with flexraid? What I do know is Backuppc must run under linux because of the hard links it uses, which means the file system I believe has to be a certain type other than ...
4
votes
3answers
2k views

Hardware RAID - what happens if the motherboard or controller fails?

I want to set up a RAID 5 array in a machine that has an intel motherboard. It has built in raid (sata). My concern is what happens if the motherboard fails? How can I take those hard drives ...
2
votes
1answer
283 views

Recover from failed recovery of software RAID5 failure

I have the pleasure ;-) to have been handed the task to try to get data off a server that had a RAID5 array problem and a failed attempt to recover it. Background: the computer in question is some ...
1
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1answer
163 views

OK to use Windows while a RAID array is building?

I've just put together a nice clean, fresh install of Windows 7 x64, and my two primary harddisks are building a software RAID1 array in the background while I type this. But I want to move over ...
4
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2answers
344 views

Harddrives to NAS

Is it wise to go for same brand/model for all the drives in a NAS, or is it ok to mix? What about mixing between different raid groups?
1
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1answer
92 views

Help with my RAID config

I've got a 250GB SATA2 hard drive. Yesterday I boughy myself a pair of 1TB HDDs which I intend to put into a RAID-1. If I enable the RAID functionality in the BIOS, I can setup the two drives in a ...
1
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1answer
468 views

Adding disk to windows-7 RAID-5

If I have a 3-disk RAID 5, and I want to add a 4th disk to the RAID, can this be done without moving all the data out of the existing raid array and rebuilding it as a 4 disk raid-5 array?
0
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1answer
49 views

What is the tolerated performance difference between HDDs?

I got a server with software RAID1 and two identical HDDs. Using hdparm -tT I get sligthly different results, one gives me 100Mb/s and the other one 97Mb/s. Is this difference tolerable in this ...
1
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2answers
509 views

Commercial NAS RAID1 disks moved to Software Raid system?

I've got a couple of commercial NAS boxes and I'm wondering if they (ReadyNas duo, DLink DNS-323) or any other NAS is suitable for having their RAIDed disks moved to a software-based NAS. To be ...
6
votes
3answers
4k views

Raid1 with active and spare partition

I am having the following problem with a RAID1 software raid partition on my Ubuntu system (10.04 LTS, 2.6.32-24-server in case it matters). One of my disks (sdb5) reported I/O errors and was ...
0
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2answers
338 views

Redundant storage of select files and synchronization between multiple computers

Historically, I've manually copied personal files onto multiple hard drives periodically to keep them backed up, but I just emptied my wallet getting certain files that were only stored in one place ...
1
vote
1answer
1k views

Auto-rebuild RAID6 with MDADM

I have an openSUSE 11.3 Linux computer with 5 disks of 1TB (WD enterprise disks) in it. With mdadm I configured a RAID6 device. Now, after a lot of thorough testing, I've noticed that when the ...
1
vote
1answer
1k views

Should I include my OS partition on my RAID or separate hard drive?

I plan to build a Linux (Ubuntu 10.04) home file server soon with 3-5 x 2TB hard drives in RAID 5 software raid but I'm not experienced with setting up RAIDs. Should I include the actual Linux host ...
0
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3answers
4k views

Software or Hardware RAID for Home Server?

Now I have searched Server Fault and Super User and have seen that some people recommend software and some people swear by hardware RAID, but I am looking to use it on a home server of mine to store ...
2
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1answer
933 views

external drive enclosure -> software RAID 5?

I have two older PCs on my LAN posing as 'servers'; one running FreeNAS off a USB stick using three 500GB HDDs in a ZFS RAID-Z pool serving as storage for the LAN and one running Debian Lenny with an ...
5
votes
1answer
13k views

How can I add a RAID 1 array in Ubuntu 10.04?

I have an existing Ubuntu 10.04 desktop system setup and running on a hard drive (drive A). I'd like to add two more hard drives (drives B and C, same size) to the system and mount them as a RAID 1 ...
11
votes
2answers
10k views

Does software RAID 1 in Windows 7 improve read speeds?

Does software RAID 1 (mirroring) in Windows 7 improve read speeds? I'd like to set up RAID 1 to help protect my important documents (yes, yes, I know it's not a backup), but performance is also ...
0
votes
1answer
282 views

What would happen in a Software Raid 1 of one HDD and one SSD?

I'm running my Windows 7 installation and all of my apps from an SSD for performance reasons. Since SSD's can instantly die at any moment, I'm looking for some kind of data backup strategy. Right Now ...
0
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1answer
157 views

Replace mainboard without damage software RAID

I am currently using software RAID on Ubuntu 10.04. Since my mainboard only supports DDR2, I want to replace it with another one. However, I'm worry about the software RAID damaged. Will the Ubuntu ...